Arctic Armor

You cover yourself in a layer of thin ice armor. You gain resistance to Cold Damage for the duration. Additionally, if you are hit by a melee weapon attack for the duration, the attacker must succeed on a Constitution Saving Throw or become Chilled until the end of their next turn.

For each level of spell slots used to cast this spell beyond 2nd, increase the duration by 1 minute. Additionally, if you cast this spell at 6th level or higher, you gain Immunity to Cold Damage for the duration instead.